Role of Preparation Method in Tailoring Ni/Al2O3 Catalysts for Low-Pressure Methanation

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22320%2F25%3A43932429" target="_blank" >RIV/60461373:22320/25:43932429 - isvavai.cz</a>
Result on the web
<a href="https://link.springer.com/article/10.1007/s10562-025-05211-5" target="_blank" >https://link.springer.com/article/10.1007/s10562-025-05211-5</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s10562-025-05211-5" target="_blank" >10.1007/s10562-025-05211-5</a>

Result language
angličtina
Original language name
Role of Preparation Method in Tailoring Ni/Al2O3 Catalysts for Low-Pressure Methanation
Original language description
Methanation is an important technological process producing synthetic natural gas. This study compares five preparation methods for Ni/Al2O3 catalysts and discusses their impact on the formation of Ni active sites and their methanation activity. Conventional wet impregnation was evaluated alongside methods involving microwave-assisted deposition (MC), ultrasonic waves (UT), and pH-adjusted methods such as ammonia evaporation (AE) and deposition precipitation (DP). These techniques primarily influenced the size of Ni active sites as well as their reducibility and stability. The stability of NiO/Ni species after reduction and methanation was described. Their performance of prepared Ni/Al2O3 was assessed in CO2 methanation within a temperature range of 250 – 490 °C under a low gauge pressure of 0.2 MPa. The highest methane yield of 42% was obtained with the MC catalyst; however, a high reaction temperature of 449 °C was needed. On the other hand, both DP and AE catalysts outperformed all tested catalysts in the catalyst productivity. This was due to the smaller Ni/NiO particles and their higher thermal stability.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10403 - Physical chemistry

Project
<a href="/en/project/TS01020038" target="_blank" >TS01020038: Validation of Power-to-X technology in real WWTP environment</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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